I have tried trading based on trendline and bollinger bands but until now I still suffer losses because it seems we need to look ahead and have to be read especially to correct trend reversals when it will happen and see in each area of your trade you will need a lot of practice, just don't touch the line and hit it towards you or whatever, we have to anticipate trade and movement, nothing is 100% and nothing you will get is full proof, we have to learn the price action from higer tf, we have to go to the bar, and what done by couples, the most important thing is to feel the market, do one thing, only trade one pair on the demo just keep taking random trades based on this trend line and bollinger bands, and try and feel the market at each time frame what they are trying to do based on higher if you will enjoy the new forex market again, the couple will listen You, we tend to trade 100 piars and million trades and finally we don't get anything attached to one or two pairs and see a miracle